| Blue Planet Ecosystems GmbH | |
| Bluechip Software GmbH | Salzburg |
| Bluetech Systems Barcodesysteme GmbH | Vienna |
| BlueVisionTec e.U. | Styria |
| BMD Systemhaus Ges.m.b.H. | Upper Austria |
| BNP Paribas S.A. Niederlassung Österreich | |
| bobits.at | |
| Böck & Partner KG | |
| Bongfish GmbH | Styria |
| bonit.at Software OG | Lower Austria |
| Bonrepublic GmbH | |
| Bookamat OG | Vienna |
| Boom Software AG | Styria |
| bplaced | Vienna |
| Brainhero GmbH | |
| Brandauer IT-Services | Tyrol |
| Brandl Talos | |
| breathe ilo GmbH | |
| Bright IT GmbH | Tyrol |
| Bright Red Systems GmbH | |
| Broken Rules Interactive Media GmbH | Vienna |
| Brunner Webhosting | Upper Austria |
| Brutkasten Media GmbH | |
| Brutkasten Media GmbH | |
| Bsurance GmbH | Vienna |
| Bundesrechenzentrum GmbH | Vienna |
| BÜRO X Design GmbH | |
| Bürosysteme Rottmann GmbH | Styria |
| Business Angel Institute | Vienna |
| Business Software GmbH | |
| Businesscard.at | Vienna |
| bww bitwise works GmbH | Carinthia |
| byrd technologies GmbH | |
| Byte Media GmbH | Lower Austria |
| ByteSource Technology Consulting GmbH | |
| C++ World KG | Lower Austria |
| c.c.com Andersen & Moser GmbH | Styria |
| C.Sitte Softwaretechnik | Salzburg |
| C21 | |
| Caboom GesbR | |
| CAD+T Solutions GmbH | Upper Austria |
| CADCAM-Services Franz Reiter | Vienna |
| Callnow | Vienna |
| Calm/Storm Ventures | |
| Calyxha Biotechnologies GmbH | |
| Campus02 | Styria |
| Candera GmbH | |
| Canon Austria GmbH | Vienna |
| Capco Austria GmbH | |
| Captic | |